Calculation of the integrated energy performance of buildings EN 15603: Energy performance of buildings

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Calculation of the integrated energy performance
of buildingsEN 15603 Energy performance of
buildings Overall energy use and definition of
energy ratings

• Johann ZIRNGIBL
• CSTB / Francejohann.zirngibl_at_cstb.fr

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Outline

• The EU CENSE project
• Background and beneficial by-products
• Scope of the Standard
• Principle of the method
• Reporting Benchmarking
• Links Building codes and EN 15603
• Conclusion and Outlook

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The EU CENSE project (Oct. 2007 - March 2010)

• Aim of the project
• To accelerate adoption and improved effectiveness
  of the EPBD related CEN- standards in the EU
  Member States
• These standards were successively published in
  the years 2007-2008 and are being implemented or
  planned to be implemented in many EU Member
  States. However, the full implementation is not a
  trivial task
• Main project activities
• To widely communicate role, status and content of
  these standards to provide guidance on the
  implementation
• To collect comments and good practice examples
  from Member States aiming to remove obstacles
• To prepare recommendations to CEN for a second
  generation of standards on the integrated energy
  performance of buildings

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Brief introduction

• A brief introduction to the CENSE project and the
  CEN-EPBD standards is provided in a separate
  presentation

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More information

• More information and downloads www.iee-cense.eu

Disclaimer CENSE has received funding from the
Communitys Intelligent Energy Europe programme
under the contract EIE/07/069/SI2.466698. The
content of this presentation reflects the authors
view. The author(s) and the European Commission
are not liable for any use that may be made of
the information contained therein. Moreover,
because this is an interim result of the project
any conclusions are only preliminary and may
change in the course of the project based on
further feedback from the contributors,
additional collected information and/or increased
insight.
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Background

• Why a methodology of the integrated energy
  performance?
• Energy Performance of Buildings Directive (EPBD)
  article 3Methodology calculating the integrated
  energy performance of buildings
• Rating Energy amount shall be reflected in one
  numeric indicator (article. 7)( taking into
  account insulation, tech. installation
  characteristics, etc.)
• Interactions between different energy services
  (e.g. heating, cooling, lighting)
• Why a European standard?
• Make possible to harmonise the various measures
  for energy efficiency in buildings between the
  Member States
• Increase the accessibility, transparency and
  objectivity of the assessment
• Avoid new trade barriers
• Adopt the same structure - starting point for
  building code coordination

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Scope of the Standard EN 15603
General framework for the assessment of overall
energy use
Top-Position of EN 15603, calculation based on
results from other standards
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Modular structure of CEN Standards
From product standards to overall energy
use Product is not longer evaluated as a product
but as part of a system Maintain the links
between product testing and system evaluation
CEN TC 48, TC 57, TC89, TC 109, etcBuilding or
system products standards(Evaluation of product
characteristics)
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Principle of the Method

• Calculation direction from needs to source (from
  the energy needs to the primary energy).
• Energy can be imported or exported (different
  weightings)
• Electrical uses and thermal uses are considered
  separately inside the building boundary.
• Inside the system boundary the system losses are
  taken into account explicitly,
• Outside the system boundary they are taken into
  account in the conversion factor (e.g. district
  heating).

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Reporting - Benchmarking
Reporting the strong and the weak points of the
overall energy use of a building
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Links between Building codes and EN 15603
Example Association of minimum energy
requirements and one global requirement
General frame EN 15603
Minimum energy requirement on Building thermal
needs Example lt 50 kWh/m2a
Minimum energy requirement on Delivered
energyExamplelt100 kWh/m2a
Global energy requirement on Energy
rating Examplelt120 kWh/m2a(less then sum of
min.req.)
Building codes requirements (Member states)
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Conclusion and Outlook

• CEN worked out a complete, consistent and
  flexible approach, from the product standard to
  the overall energy use
• EN 15603 is the top standard of this approach
  defining the whole structure
• Reporting according EN 15603 underlines the
  strong and weak points in the overall energy use
  of a building
• Adopting EN 15603 in national building regulation
  is the first step towards an European calculation
  method

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More information

• More information and downloads www.iee-cense.eu

Disclaimer CENSE has received funding from the
Communitys Intelligent Energy Europe programme
under the contract EIE/07/069/SI2.466698. The
content of this presentation reflects the authors
view. The author(s) and the European Commission
are not liable for any use that may be made of
the information contained therein. Moreover,
because this is an interim result of the project
any conclusions are only preliminary and may
change in the course of the project based on
further feedback from the contributors,
additional collected information and/or increased
insight.